Total area of 6 columns = side length × side length ×6

=0.5×0.5×6

= 1.5 m2

Volume of six columns = bottom area × height ×6

=0.5×0.5×4×6

=6 cubic meters

Tile area of each column = (length× height+width× height )× 2 (top and bottom)

=(0.5×4+0.5×4)×2

=8 square meters